In accordance with an embodiment of the present invention, a method of polishing a device includes providing a layer having a non-uniform top surface. The non-uniform top surface includes a plurality of protrusions. The method further includes removing the plurality of protrusions by exposing the layer to a fluid that has gas bubbles and a liquid.
Legal claims defining the scope of protection, as filed with the USPTO.
1. A processing tool comprising: a chuck for holding a substrate; a nozzle coupled to an opening of the chuck; a mixing area disposed under the nozzle; a first gas inlet for a gas coupled to the nozzle through the mixing area; a second gas inlet for injecting the gas facing the first gas inlet; and a liquid inlet coupled to the nozzle through the mixing area, the liquid inlet being orthogonal to the first gas inlet and the second gas inlet, wherein the mixing area is configured to mix the gas in to the liquid, wherein the mixing area and the nozzle are part of an integral single piece, wherein the outlet of the mixing area is directly connected to the inlet of the nozzle, wherein the nozzle is configured to release a fluid comprising gas bubbles and a liquid.
2. The tool of claim 1 , wherein the nozzle is disposed in a central region of the chuck.
3. The tool of claim 1 , wherein the nozzle is disposed in a peripheral region around a central region of the chuck.
4. The tool of claim 1 , further comprising another nozzle disposed in another opening of the chuck, the another nozzle coupled to the first gas inlet and the liquid inlet.
5. The tool of claim 1 , wherein the chuck is rotatable.
6. The tool of claim 1 , further comprising a plurality of blades for generating a low pressure region above the chuck.
7. The tool of claim 6 , wherein the first gas inlet is configured to inject the gas due to pressure difference between the low pressure region above the chuck and a high pressure region under the chuck.
8. The tool of claim 6 , wherein the plurality of blades are configured to hold the substrate.
9. The tool of claim 1 , wherein the nozzle is configured to release a fluid flowing turbulently.
10. The tool of claim 1 , wherein a top surface of the chuck is textured.
11. A processing tool comprising: a chuck for holding a substrate and comprising an opening; a mixing area disposed under the chuck, the mixing area configured to mix a gas with a liquid; a first nozzle directly connected to the mixing area; and a second nozzle directly connected to the mixing area, the first and the second nozzles having an outlet in a common plane parallel to a major surface of the chuck, the first nozzle being laterally spaced from the second nozzle along the common plane, wherein the mixing area comprises a liquid inlet to inject a liquid into the first and the second nozzles, a first gas inlet to suck a gas into the first and the second nozzles, a second gas inlet to suck additional gas into the first and the second nozzles, the second gas inlet facing the first gas inlet, the liquid inlet being orthogonal to the first gas inlet and the second gas inlet, and an outlet configured to release a fluid mixture over the chuck through the first and the second nozzles, the fluid mixture comprising gas bubbles and a liquid.
12. The tool of claim 11 , wherein the first nozzle is disposed in a central region of the chuck, and the second nozzle is disposed in a peripheral region of the chuck.
13. The tool of claim 11 , wherein the chuck is rotatable.
14. The tool of claim 11 , further comprising a plurality of blades for generating a low pressure region above the chuck.
15. The tool of claim 14 , wherein the first gas inlet is configured to inject the gas due to pressure difference between the low pressure region above the chuck and a high pressure region under the chuck.
16. The tool of claim 14 , wherein the plurality of blades are configured to hold the substrate.
17. The tool of claim 11 , wherein a top surface of the chuck is textured.
18. A processing tool comprising: a chuck for holding a substrate, the chuck comprising a central region and a surrounding peripheral region, the chuck comprising an opening in the central region, wherein a top surface of the chuck in the peripheral region comprises a plurality of ridges and a plurality of valleys, wherein the plurality of ridges are arranged around the central region in a circular pattern; a mixing area disposed under a nozzle; the nozzle disposed directly underneath the opening of the chuck, wherein the nozzle comprises a liquid inlet to inject a liquid into the nozzle through the mixing area, a first gas inlet to suck a gas into the nozzle through the mixing area, a second gas inlet to suck additional gas into the nozzle through the mixing area, the second gas inlet facing the first gas inlet, the liquid inlet being orthogonal to the first gas inlet and the second gas inlet, and an outlet configured to release a fluid mixture over the chuck, the fluid mixture comprising gas bubbles and a liquid, wherein the mixing area and the nozzle are part of an integral single piece; and a plurality of blades disposed at a peripheral region of the chuck.
19. The tool of claim 18 , wherein the chuck is rotatable.
20. The tool of claim 18 , wherein the first gas inlet is configured to inject the gas due to pressure difference between a low pressure region above the chuck and a high pressure region under the chuck.
21. The tool of claim 18 , further comprising a third gas inlet perpendicular to the first gas inlet and the second gas inlet, the third gas inlet being parallel to the liquid inlet, the third gas inlet surrounding the liquid inlet in a concentric manner.
22. The tool of claim 18 , wherein the plurality of ridges are arranged in a concentric pattern.
23. The tool of claim 18 , wherein the plurality of ridges extend radially and are discontinuous along a angular direction of the circular pattern.
24. The tool of claim 18 , further comprising separate fasteners for holding the substrate, wherein the plurality of blades are configured to rotate independent of the substrate.
Cooperative Patent Classification codes for this invention. Click any code to explore related patents in that topic.
September 9, 2014
February 12, 2019
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